The term REGION OF CENTRAL SPAIN can be summarized as the Castile region, which is a seven-letter word. Castile is a historical region of Spain located in the center of the country. It is bordered by the autonomous communities of Extremadura, Madrid, and La Rioja, and is home to the capital city of Madrid. Castile has been an important part of Spanish history since the Middle Ages, and is known for its rich culture and traditions.